 /*******************************************************************************
  * Copyright (c) 2006, 2007 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/

 package org.eclipse.ui.internal.quickaccess;

 import java.util.HashMap ;
 import java.util.List ;
 import java.util.Map ;

 import org.eclipse.jface.preference.IPreferenceNode;
 import org.eclipse.jface.preference.PreferenceManager;
 import org.eclipse.jface.resource.ImageDescriptor;
 import org.eclipse.jface.viewers.ISelection;
 import org.eclipse.jface.viewers.IStructuredSelection;
 import org.eclipse.ui.IWorkbenchPage;
 import org.eclipse.ui.PlatformUI;
 import org.eclipse.ui.internal.IWorkbenchGraphicConstants;
 import org.eclipse.ui.internal.WorkbenchImages;
 import org.eclipse.ui.internal.dialogs.PropertyPageContributorManager;
 import org.eclipse.ui.internal.dialogs.PropertyPageManager;

 /**
  * @since 3.3
  *
  */
 public class PropertiesProvider extends QuickAccessProvider {

     private Map idToElement;

     public QuickAccessElement getElementForId(String id) {
         getElements();
         return (PropertiesElement) idToElement.get(id);
     }

     public QuickAccessElement[] getElements() {
         if (idToElement == null) {
             idToElement = new HashMap ();
             IWorkbenchPage activePage = PlatformUI.getWorkbench()
                     .getActiveWorkbenchWindow().getActivePage();
             if (activePage != null) {
                 PropertyPageManager pageManager = new PropertyPageManager();
                 ISelection selection = activePage.getSelection();
                 if (selection instanceof IStructuredSelection
                         && !selection.isEmpty()) {
                     Object element = ((IStructuredSelection) selection)
                             .getFirstElement();
                     PropertyPageContributorManager.getManager().contribute(
                             pageManager, element);
                     List list = pageManager
                             .getElements(PreferenceManager.PRE_ORDER);
                     IPreferenceNode[] properties = (IPreferenceNode[]) list
                             .toArray(new IPreferenceNode[list.size()]);
                     for (int i = 0; i < properties.length; i++) {
                         PropertiesElement propertiesElement = new PropertiesElement(
                                 element, properties[i], this);
                         idToElement.put(propertiesElement.getId(),
                                 propertiesElement);
                     }
                 }
             }
         }
         return (QuickAccessElement[]) idToElement.values().toArray(
                 new QuickAccessElement[idToElement.values().size()]);
     }

     public String getId() {
         return "org.eclipse.ui.properties"; //$NON-NLS-1$
 }

     public ImageDescriptor getImageDescriptor() {
         return WorkbenchImages
                 .getImageDescriptor(IWorkbenchGraphicConstants.IMG_OBJ_NODE);
     }

     public String getName() {
         return QuickAccessMessages.QuickAccess_Properties;
     }
 }

